Tearjeaker

Well, sorry I don't believe in some stories.
This is not just directed to the OP, but a lot of people here claiming abuse as an desperate way to just stay in the US.
 
I'm just being realistic. I like my attitude, thanks.
 

Don't play the "abused me" card unless you really were and have concrete evidence.
 
Give her some space. If it's meant to be then it'll be. If not, then you have some important decisions to make.

You haven't said anything about wanting to work on making a success of the marriage. If my husband said he "wasn't interested" anymore I'd be distraught and would do anything to get the marriage back on track. Have you tried counseling? Have you suggested she try some anger management therapy if she has a temper? It seems you are expecting her to file a divorce but you don't seem too desperate to stay married to her. 
 
She has been through a very stressful time too. You gave up your career but she has also been through some huge emotional transitions in her life recently. She's a career woman and I imagine she lived a very independent life before you arrived. Now she's sharing her space with someone who doesn't work, she's working for the two of you, she spent a lot money and went through a lot of stress to get you here. What do you do for her? Marriage is not a bed of roses. It takes work. A lot of hard work.